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  1. Kiwi

    AC Compressor blowing fuse

    OK, it is reasonably safe to assume that the clutch is NOT your problem. Chances of fitting a new unit with same problem as original are pretty slim. Diode is in the fuse box, not at the clutch? Increase in resistance from 3.5Ω cold to 4.0Ω hot is probably fine. On a 12volt vehicle this would...
  2. Kiwi

    738 paradox alarm system error #2 problem

    Key [2] Power failure Activates when inadequate AC power goes to panel OR the power supply is unable to charge battery OR the power supply voltage exceeds 14.9V Is there a problem with the voltage regulator on the board?
  3. Kiwi

    AC Compressor blowing fuse

    Jerry, The diode is wired in parallel with the compressor clutch to absorb the high voltage spike when the clutch is turned off. Search Google for "flyback diode" for information on their use. Your meter gave a "low reading". What resistance did your meter show? Can you measure the resistance...
  4. Kiwi

    12vdc Pulse Timer

    The diagram I posted above is a very basic system. There have been all sorts of variations to the indicator system, eg using the rear orange indicator lights as reverse lights, using the rear red indicator lights as brake lights(USA), sequential rear indicator lights(Ford Mustang). Steve, your...
  5. Kiwi

    12vdc Pulse Timer

    In the standard vehicle indicator light system there is no signal sent from the indicator switch to the indicator relay(flasher unit). The switch is connected after the flasher unit and simply connects the flasher unit output to the left or right indicator lights, depending on which way the...
  6. Kiwi

    12vdc Pulse Timer

    Martin, I don't think you have quite grasped the problem in fitting cornering lights to a vehicle yet. "I would prefer the 'cornering lights' be to be on the whole time the indicator is on." The timer will keep the cornering lights on from when the indicators flash for the first time, until 3...
  7. Kiwi

    12vdc Pulse Timer

    Cornering lights are fitted to vehicles to light up the dark area, not illuminated by your headlights, that you are turning into at night, eg into a driveway. I wish my car had them when entering my narrow driveway. I would guess that he is trying to use the 12v pulses to the indicator lamps...
  8. Kiwi

    Problem modding an ATX power supply

    What is the make and model of the PSU? How long do you have to leave it unplugged before it will restart? Have you tried connecting the green to black a few seconds AFTER connecting the mains? Do you have a 10Ω resistor connected between red and black? Have you joined all the wires of each...
  9. Kiwi

    Resistor value

    Yes, some of the questions leave a bit to be desired. 40% is pretty low for a pass too.
  10. Kiwi

    Resistor value

    I am a little confused. They give R3 value as 120Ω and voltage drop as 160V. Using Ohms Law: I = V/R = 160/120 = 1.333Amps. In (a) they give It as 4A, so V = I x R = 4 x 120 = 480V What happened to the given voltage of 160V??? (b) Parallel resistance of R1 and R2 network is easy enough to...
  11. Kiwi

    simple circuit drawing software

    I also use ExpressPCB for my diagrams. Been using it for over ten years, so have built up quite a collection of symbols. I have recently installed DesignSpark PCB from RS Components, but haven't had a chance to play with it yet.
  12. Kiwi

    PWM solenoid use

    Elanor is a little upset with the negative comments on Henry's stable of fine motor cars. Everyone knows that FORD is an acronym for First On Race Day.:D
  13. Kiwi

    turn on/off a heat lamp, automatic.

    "Outdoors"??? Water and electricity don't work well together. What is the application? Type "thermostat" into ebay and you will see lots of different types. One of them may suit your application. WARNING. Household mains electrical supply can be lethal, so don't put yourself or others at...
  14. Kiwi

    I Want Your Thought About My Summer Project

    Thinking of doing the same thing myself. Haven't told the wife that I want the spare bedroom yet! "B" is your work area, so I would have multi-plugs on the wall at each end. That way the leads don't come across your work area. You can place the soldering iron etc to the side when not using it...
  15. Kiwi

    bulb detection by "canbus" lightning controller

    A standard headlamp has a filament for low, and a filament for high. The bixenon headlight has a bulb with only one filament that is used in both low and high beams. It has a shutter that changes position to give high beam. The diode is being used to operate the shutter and also turn the bulb...
  16. Kiwi

    Dual filter controller

    I have had a very quick look and would like to make a couple of suggestions regarding the drawing method; 1 - The Relay Board is the most complicated part, but is the smallest area of the drawing. Very hard to follow. 2 - The loops where wires cross makes the drawing look messy. Much tidier to...
  17. Kiwi

    timed relay adjustmemt

    I wasn't going to respond in this thread again after my original post, but....... Hella is a well respected German based company that manufactures a wide range of quality products in the automotive and associated fields. I have been using their products for over thirty years as an Automotive...
  18. Kiwi

    Need a 555 cct that can only be triggered once during its countdown time

    G'day Dave, hope the health is improving. My suggestion would be to disconnect the push button from the doorbell circuit during the count down, and connect it to a car windscreen washer pump. That way if the button was pressed they would get a squirt of water. :D
  19. Kiwi

    Can I connect a Car Lighter Adapter directly to a car battery and use it to power electronics?

    There is nothing to stop you connecting the adapter directly to the battery. Make sure to fit a fuse as close to the battery as possible. Use proper connections to the battery with terminals, not just twisted wires under a bolt. Use correctly sized wire from the battery to the adapter. Do the...
  20. Kiwi

    hospital yet again

    I hope they have consulted the world's greatest doctor, Dr. Google for his opinion.;) Seriously though, best wishes from across the ditch. Hope you get well soon.
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